# Algebraic Expressions

### Exercises

#### Exercise 3

Ruth gets $2 every time she helps her dad gather sticks in the yard. Apparently, there is a major stick epidemic in their neighborhood. Let *t* be the number of times Ruth helps her dad gather sticks in the yard, and let *R* be the amount of money Ruth gets for picking up the sticks. Why are *R* and *t* good letters to use as variables for this problem?

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